/*
 * Copyright (c) 2010-2023 Belledonne Communications SARL.
 *
 * This file is part of linphone-iphone
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

import SwiftUI
import linphonesw

// swiftlint:disable type_body_length
struct StartCallFragment: View {
	private var idiom: UIUserInterfaceIdiom { UIDevice.current.userInterfaceIdiom }
	
	@ObservedObject var contactsManager = ContactsManager.shared
	@ObservedObject var magicSearch = MagicSearchSingleton.shared
	@ObservedObject private var telecomManager = TelecomManager.shared
	
	@EnvironmentObject var callViewModel: CallViewModel
	
	@StateObject private var startCallViewModel = StartCallViewModel()
	
	@Binding var isShowStartCallFragment: Bool
	@Binding var showingDialer: Bool
	
	@FocusState var isSearchFieldFocused: Bool
	@State private var delayedColor = Color.white
	
	@FocusState var isMessageTextFocused: Bool
	
	var resetCallView: () -> Void
	
	var body: some View {
		NavigationView {
			if #available(iOS 16.4, *), idiom != .pad {
				startCall
					.sheet(isPresented: $showingDialer) {
						DialerBottomSheet(
							startCallViewModel: startCallViewModel,
							callViewModel: callViewModel,
							isShowStartCallFragment: $isShowStartCallFragment,
							showingDialer: $showingDialer,
							currentCall: nil
						)
						.presentationDetents([.medium])
						.presentationBackgroundInteraction(.enabled(upThrough: .medium))
					}
			} else {
				startCall
					.halfSheet(showSheet: $showingDialer) {
						DialerBottomSheet(
							startCallViewModel: startCallViewModel,
							callViewModel: callViewModel,
							isShowStartCallFragment: $isShowStartCallFragment,
							showingDialer: $showingDialer,
							currentCall: nil
						)
					} onDismiss: {}
			}
		}
		.navigationViewStyle(StackNavigationViewStyle())
	}
	
	var startCall: some View {
		ZStack {
			VStack(spacing: 1) {
				
				Rectangle()
					.foregroundColor(delayedColor)
					.edgesIgnoringSafeArea(.top)
					.frame(height: 0)
					.task(delayColor)
				
				HStack {
					Image("caret-left")
						.renderingMode(.template)
						.resizable()
						.foregroundStyle(Color.orangeMain500)
						.frame(width: 25, height: 25, alignment: .leading)
						.padding(.all, 10)
						.padding(.top, 2)
						.padding(.leading, -10)
						.onTapGesture {
							DispatchQueue.main.asyncAfter(deadline: .now() + 0.3) {
								magicSearch.searchForContacts(
									sourceFlags: MagicSearch.Source.Friends.rawValue | MagicSearch.Source.LdapServers.rawValue)
								
								if callViewModel.isTransferInsteadCall == true {
									callViewModel.isTransferInsteadCall = false
								}
								
								resetCallView()
							}
							
							startCallViewModel.searchField = ""
							magicSearch.currentFilterSuggestions = ""
							delayColorDismiss()
							withAnimation {
								isShowStartCallFragment.toggle()
							}
						}
					
					Text(!callViewModel.isTransferInsteadCall ? "history_call_start_title" : "call_transfer_current_call_title")
						.multilineTextAlignment(.leading)
						.default_text_style_orange_800(styleSize: 16)
					
					Spacer()
					
				}
				.frame(maxWidth: .infinity)
				.frame(height: 50)
				.padding(.horizontal)
				.padding(.bottom, 4)
				.background(.white)
				
				VStack(spacing: 0) {
					ZStack(alignment: .trailing) {
						TextField("history_call_start_search_bar_filter_hint", text: $startCallViewModel.searchField)
							.default_text_style(styleSize: 15)
							.frame(height: 25)
							.focused($isSearchFieldFocused)
							.padding(.horizontal, 30)
							.onChange(of: startCallViewModel.searchField) { newValue in
								magicSearch.currentFilterSuggestions = newValue
								magicSearch.searchForSuggestions()
							}
							.simultaneousGesture(TapGesture().onEnded {
								showingDialer = false
							})
						
						HStack {
							Button(action: {
							}, label: {
								Image("magnifying-glass")
									.renderingMode(.template)
									.resizable()
									.foregroundStyle(Color.grayMain2c500)
									.frame(width: 25, height: 25)
							})
							
							Spacer()
							
							if startCallViewModel.searchField.isEmpty {
								Button(action: {
									if !showingDialer {
										isSearchFieldFocused = false
										
										DispatchQueue.main.asyncAfter(deadline: .now() + 0.3) {
											showingDialer = true
										}
									} else {
										showingDialer = false
										
										DispatchQueue.main.asyncAfter(deadline: .now() + 0.3) {
											isSearchFieldFocused = true
										}
									}
								}, label: {
									Image(!showingDialer ? "dialer" : "keyboard")
										.renderingMode(.template)
										.resizable()
										.foregroundStyle(Color.grayMain2c500)
										.frame(width: 25, height: 25)
								})
							} else {
								Button(action: {
									startCallViewModel.searchField = ""
									magicSearch.currentFilterSuggestions = ""
									magicSearch.searchForSuggestions()
								}, label: {
									Image("x")
										.renderingMode(.template)
										.resizable()
										.foregroundStyle(Color.grayMain2c500)
										.frame(width: 25, height: 25)
								})
							}
						}
					}
					.padding(.horizontal, 15)
					.padding(.vertical, 10)
					.cornerRadius(60)
					.overlay(
						RoundedRectangle(cornerRadius: 60)
							.inset(by: 0.5)
							.stroke(isSearchFieldFocused ? Color.orangeMain500 : Color.gray200, lineWidth: 1)
					)
					.padding(.vertical)
					.padding(.horizontal)
					
					NavigationLink(destination: {
						StartGroupCallFragment(startCallViewModel: startCallViewModel)
					}, label: {
						HStack {
							HStack(alignment: .center) {
								Image("meetings")
									.renderingMode(.template)
									.resizable()
									.foregroundStyle(.white)
									.frame(width: 20, height: 20, alignment: .leading)
							}
							.padding(16)
							.background(Color.orangeMain500)
							.cornerRadius(40)
							
							Text("history_call_start_create_group_call")
								.foregroundStyle(.black)
								.default_text_style_800(styleSize: 16)
							
							Spacer()
							
							Image("caret-right")
								.renderingMode(.template)
								.resizable()
								.foregroundStyle(Color.grayMain2c500)
								.frame(width: 25, height: 25, alignment: .leading)
						}
					})
					.padding(.vertical, 10)
					.padding(.horizontal, 20)
					.background(
						LinearGradient(gradient: Gradient(colors: [.grayMain2c100, .white]), startPoint: .leading, endPoint: .trailing)
							.padding(.vertical, 10)
							.padding(.horizontal, 40)
					)
					
					ScrollView {
						if !ContactsManager.shared.lastSearch.isEmpty {
							HStack(alignment: .center) {
								Text("contacts_list_all_contacts_title")
									.default_text_style_800(styleSize: 16)
								
								Spacer()
							}
							.padding(.vertical, 10)
							.padding(.horizontal, 16)
						}
						
						ContactsListFragment(showingSheet: .constant(false)
											 , startCallFunc: { addr in
							if callViewModel.isTransferInsteadCall {
								showingDialer = false
								
								DispatchQueue.main.asyncAfter(deadline: .now() + 0.3) {
									magicSearch.searchForContacts(
										sourceFlags: MagicSearch.Source.Friends.rawValue | MagicSearch.Source.LdapServers.rawValue)
									
									if callViewModel.isTransferInsteadCall == true {
										callViewModel.isTransferInsteadCall = false
									}
									
									resetCallView()
								}
								
								startCallViewModel.searchField = ""
								magicSearch.currentFilterSuggestions = ""
								delayColorDismiss()
								
								withAnimation {
									isShowStartCallFragment.toggle()
									callViewModel.blindTransferCallTo(toAddress: addr)
								}
							} else {
								showingDialer = false
								
								DispatchQueue.main.asyncAfter(deadline: .now() + 0.3) {
									magicSearch.searchForContacts(
										sourceFlags: MagicSearch.Source.Friends.rawValue | MagicSearch.Source.LdapServers.rawValue)
									
									if callViewModel.isTransferInsteadCall == true {
										callViewModel.isTransferInsteadCall = false
									}
									
									resetCallView()
								}
								
								startCallViewModel.searchField = ""
								magicSearch.currentFilterSuggestions = ""
								delayColorDismiss()
								
								withAnimation {
									isShowStartCallFragment.toggle()
									telecomManager.doCallOrJoinConf(address: addr)
								}
							}
						})
						.padding(.horizontal, 16)
						
						if !contactsManager.lastSearchSuggestions.isEmpty {
							HStack(alignment: .center) {
								Text("generic_address_picker_suggestions_list_title")
									.default_text_style_800(styleSize: 16)
								
								Spacer()
							}
							.padding(.vertical, 10)
							.padding(.horizontal, 16)
							
							suggestionsList
						}
					}
				}
				.frame(maxWidth: .infinity)
			}
			.background(.white)
			
			if !startCallViewModel.participants.isEmpty {
				startCallPopup
					.background(.black.opacity(0.65))
					.onAppear {
						DispatchQueue.main.asyncAfter(deadline: .now() + 0.6) {
							isMessageTextFocused = true
						}
					}
			}
			
			if startCallViewModel.operationInProgress {
				PopupLoadingView()
					.background(.black.opacity(0.65))
					.onDisappear {
						isShowStartCallFragment.toggle()
					}
			}
		}
		.navigationTitle("")
		.navigationBarHidden(true)
	}
	
	@Sendable private func delayColor() async {
		try? await Task.sleep(nanoseconds: 250_000_000)
		delayedColor = Color.orangeMain500
	}
	
	func delayColorDismiss() {
		Task {
			try? await Task.sleep(nanoseconds: 80_000_000)
			delayedColor = .white
		}
	}
	
	var suggestionsList: some View {
		ForEach(0..<contactsManager.lastSearchSuggestions.count, id: \.self) { index in
			Button {
				if callViewModel.isTransferInsteadCall {
					showingDialer = false
					
					DispatchQueue.main.asyncAfter(deadline: .now() + 0.3) {
						magicSearch.searchForContacts(
							sourceFlags: MagicSearch.Source.Friends.rawValue | MagicSearch.Source.LdapServers.rawValue)
						
						if callViewModel.isTransferInsteadCall == true {
							callViewModel.isTransferInsteadCall = false
						}
						
						resetCallView()
					}
					
					startCallViewModel.searchField = ""
					magicSearch.currentFilterSuggestions = ""
					delayColorDismiss()
					
					withAnimation {
						isShowStartCallFragment.toggle()
						if contactsManager.lastSearchSuggestions[index].address != nil {
							callViewModel.blindTransferCallTo(toAddress: contactsManager.lastSearchSuggestions[index].address!)
						}
					}
				} else {
					showingDialer = false
					
					DispatchQueue.main.asyncAfter(deadline: .now() + 0.3) {
						magicSearch.searchForContacts(
							sourceFlags: MagicSearch.Source.Friends.rawValue | MagicSearch.Source.LdapServers.rawValue)
						
						if callViewModel.isTransferInsteadCall == true {
							callViewModel.isTransferInsteadCall = false
						}
						
						resetCallView()
					}
					
					startCallViewModel.searchField = ""
					magicSearch.currentFilterSuggestions = ""
					delayColorDismiss()
					
					withAnimation {
						isShowStartCallFragment.toggle()
						if contactsManager.lastSearchSuggestions[index].address != nil {
							telecomManager.doCallOrJoinConf(address: contactsManager.lastSearchSuggestions[index].address!)
						}
					}
				}
			} label: {
				HStack {
					if index < contactsManager.lastSearchSuggestions.count
						&& contactsManager.lastSearchSuggestions[index].address != nil {
						if contactsManager.lastSearchSuggestions[index].address!.displayName != nil {
							Image(uiImage: contactsManager.textToImage(
								firstName: contactsManager.lastSearchSuggestions[index].address!.displayName!,
								lastName: ""))
							.resizable()
							.frame(width: 45, height: 45)
							.clipShape(Circle())
							
							Text(contactsManager.lastSearchSuggestions[index].address?.displayName ?? "")
								.default_text_style(styleSize: 16)
								.frame(maxWidth: .infinity, alignment: .leading)
								.foregroundStyle(Color.orangeMain500)
						} else if contactsManager.lastSearchSuggestions[index].address!.username != nil {
							Image(uiImage: contactsManager.textToImage(
								firstName: contactsManager.lastSearchSuggestions[index].address!.username!,
								lastName: ""))
							.resizable()
							.frame(width: 45, height: 45)
							.clipShape(Circle())
							
							Text(contactsManager.lastSearchSuggestions[index].address!.username ?? "")
								.default_text_style(styleSize: 16)
								.frame(maxWidth: .infinity, alignment: .leading)
								.foregroundStyle(Color.orangeMain500)
						} else {
							Image(uiImage: contactsManager.textToImage(
								firstName: String(contactsManager.lastSearchSuggestions[index].address!.asStringUriOnly().dropFirst(4)),
								lastName: ""))
							.resizable()
							.frame(width: 45, height: 45)
							.clipShape(Circle())
							
							Text(String(contactsManager.lastSearchSuggestions[index].address!.asStringUriOnly().dropFirst(4)))
								.default_text_style(styleSize: 16)
								.frame(maxWidth: .infinity, alignment: .leading)
								.foregroundStyle(Color.orangeMain500)
						}
					} else {
						Image("profil-picture-default")
							.resizable()
							.frame(width: 45, height: 45)
							.clipShape(Circle())
						
						Text("username_error")
							.default_text_style(styleSize: 16)
							.frame(maxWidth: .infinity, alignment: .leading)
							.foregroundStyle(Color.orangeMain500)
					}
				}
				.padding(.horizontal)
			}
			.buttonStyle(.borderless)
			.listRowSeparator(.hidden)
		}
	}
	
	var startCallPopup: some View {
		GeometryReader { geometry in
			VStack(alignment: .leading) {
				Text("history_group_call_start_dialog_set_subject")
					.default_text_style_800(styleSize: 16)
					.frame(alignment: .leading)
					.padding(.bottom, 2)
				
				TextField("history_group_call_start_dialog_subject_hint", text: $startCallViewModel.messageText)
					.default_text_style(styleSize: 15)
					.frame(height: 25)
					.padding(.horizontal, 20)
					.padding(.vertical, 15)
					.cornerRadius(60)
					.overlay(
						RoundedRectangle(cornerRadius: 60)
							.inset(by: 0.5)
							.stroke(isMessageTextFocused ? Color.orangeMain500 : Color.gray200, lineWidth: 1)
					)
					.padding(.bottom)
					.focused($isMessageTextFocused)
				
				Button(action: {
					startCallViewModel.participants.removeAll()
				}, label: {
					Text("dialog_cancel")
						.default_text_style_orange_600(styleSize: 20)
						.frame(height: 35)
						.frame(maxWidth: .infinity)
				})
				.padding(.horizontal, 20)
				.padding(.vertical, 10)
				.cornerRadius(60)
				.overlay(
					RoundedRectangle(cornerRadius: 60)
						.inset(by: 0.5)
						.stroke(Color.orangeMain500, lineWidth: 1)
				)
				.padding(.bottom, 10)
				
				Button(action: {
					startCallViewModel.createGroupCall()
				}, label: {
					Text("dialog_call")
						.default_text_style_white_600(styleSize: 20)
						.frame(height: 35)
						.frame(maxWidth: .infinity)
				})
				.padding(.horizontal, 20)
				.padding(.vertical, 10)
				.background(startCallViewModel.messageText.isEmpty ? Color.orangeMain100 : Color.orangeMain500)
				.cornerRadius(60)
				.disabled(startCallViewModel.messageText.isEmpty)
			}
			.padding(.horizontal, 20)
			.padding(.vertical, 20)
			.background(.white)
			.cornerRadius(20)
			.padding(.horizontal)
			.frame(maxHeight: .infinity)
			.shadow(color: Color.orangeMain500, radius: 0, x: 0, y: 2)
			.frame(maxWidth: SharedMainViewModel.shared.maxWidth)
			.position(x: geometry.size.width / 2, y: geometry.size.height / 2)
		}
	}
}

#Preview {
	StartCallFragment(
		isShowStartCallFragment: .constant(true),
		showingDialer: .constant(false),
		resetCallView: {}
	)
}

// swiftlint:enable type_body_length